Re: Can't execute servlet project

Wed, 27 Aug 2008 05:09:10 -0700

I see .... the jsp is a view and as such wasn't designed to be run on it's own. Try http://localhost/DBTest/ListCustomers in your browser. That should hit the servlet which in turn should generate the required bean and forward the user to your jsp. 

--David


sam wun wrote:

Hi, thanks for trying to help.

I dont' have a clue on this *bean*.

The entire tutorial doesn't mention about how to setup a bean...



The tutorial I;ve followed is shown as below:

http://java.sys-con.com/node/152270





Thanks

Sam




----- Original Message -----
From: David Smith
Sent: 26/08/08 11:28 pm
To: Tomcat Users List
Subject: Re: Can't execute servlet project
1. The 404 error accessing /DbTest/ -- define a welcome file in DBTest/WEB-INF/web.xml. Online docs at tomcat.apache.org and the servlet spec will help with this.
2. It would appear you need to do some more research on what you want to do. It looks like you are trying to expose an ArrayList stored in the request scope, but the jsp can't find it, hence the error. Where is this object supposed to come from if you didn't create a bean? 

--David

sam wun wrote:

HI tere,

I have completed a servlet project in Eclipse (3.4).
I also made a war.file by seleting the project name (DBTest in this
case)
and the export command from the Eclipse menu, and export it to the
Tomcat 
5.5.26 server in linux using manager.
However when I click on the project name (/DBTest) in the manager
webpage, 
it shown the following error:
=================================
HTTP Status 404 - /DBTest/
type Status report
message /DBTest/

description The requested resource (/DBTest/) is not available.
Apache Tomcat/5.5.26
=================================

Here is the jsp file in the tomcat server:
linux:~/tomcat/apache-tomcat-5.5.26/webapps/DBTest # ls
.  ..  META-INF  WEB-INF  customers.jsp
its content is shown as below:
----------------------------------------
linux:~/tomcat/apache-tomcat-5.5.26/webapps/DBTest # vi customers.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; 
charset=ISO-8859-1">

<title>Customers list</title>
</head>
<body>
<jsp:useBean id="customers" type="java.util.ArrayList<domain.Customer>" scope="request"/> 

<b>Registered Customers:</b><br>
<table border="1">
<tr>
        <th>ID</th>
        <th>First Name</th>
        <th>Last Name</th>
        <th>Address</th>
<th>Orders</th>
</tr>
<% for(domain.Customer c : customers) { %>
<tr>
        <td><%= c.getId() %></td>
        <td><%= c.getFirstName() %></td>
        <td><%= c.getLastName() %></td>
        <td><%= c.getAddress() %></td>
<td><a href="/DBTest/ListCustomerOrders?cust_id=<%= c.getId() %>">Orders</a></td> 
<% } %>

</body>
</html>
--------------------------------------------
If I execute a more specific url (http://10.1.9.1:8080/DBTest/customers.jsp) from the web browser 
(firefox),

it shows different errors:

HTTP Status 500 -

type Exception report

message
description The server encountered an internal error () that prevented
it 
from fulfilling this request.

exception

org.apache.jasper.JasperException: Exception in JSP: /customers.jsp:11

8: </head>
9: <body>
10: 11: <jsp:useBean id="customers"
type="java.util.ArrayList<domain.Customer>" 
scope="request"/>
12: 13: <b>Registered Customers:</b><br> 
14: <table border="1">


Stacktrace:

org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:451)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)

    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause

javax.servlet.ServletException: bean customers not found within scope

org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841)

org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774)

    org.apache.jsp.customers_jsp._jspService(customers_jsp.java:97)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)

    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause

java.lang.InstantiationException: bean customers not found within scope
    org.apache.jsp.customers_jsp._jspService(customers_jsp.java:55)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)

    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.26 logs. 


I haven't create any *bean*, but servlet only.
How to get fix problem?

Your help is much appreciated.

Thanks
Sam




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